Object: N3221 On scan num: 477 479 481 Off scan num: 478 480 482 R.A.: 10.371727 hrs Dec.: 21.573149 deg On azimuth: 206.778026 deg On zenith dist.: 18.454317 deg Off azimuth: 206.800282 deg Off zenith dist.: 18.457245 deg MJD: 52260 UTC: 0.437662 Center freq.: 1401.435764 MHz Doppler: 0.00008873 Num. correlators: 2 Spectrom. atten.: 33 38 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 600 seconds
This spectrum is the integration of all data for the scan with spectra from both polarizations added together. The spectral intensities are Ssys * (on - off) / off, where Ssys is the system temperature in Jy. The system noise flux density equivalent is calibrated for each scan with a calibration noise source firing during each scan. The cal value, in Jy, is calibrated by comparison with a number of continuum sources as described in the summary web page
This spectrum is the same as Figure 1 but with 9 60-second sub-integrations manually deleted because of interference or a bad baseline.
This is the section of spectrum measured to obtain the parameters listed below. The three horizontal dotted lines are the baseline, the peak level selected, and 20% of the peak level. The two vertical dotted lines mark the selected 20% line width edges. The solid horizontal line marks the velocity range chosen for the the line profile flux density integral. This spectrum has a second-order least squares fit baseline removed using most of the baseline shown in Figure 2. Narrow band interference was removed from 3 channels by interpolation between the nearest valid channels
Peak intensity: 0.066 Jy Lower 20% velocity: 3818.3 km/s Upper 20% velocity: 4390.7 km/s Systemic velocity: 4104.5 km/s Line width (20%): 572.4 km/s Profile integral: 27.98 Jy * km/s A: 22.63 B: 28.65 Ratio B/A: 1.266 Flux integral velocity range: 3792.7 - 4419.5 km/s